There is now an allowance to fix a known issue with the connector on the 99+ cam position sensors (CPS):
http://cdn.growassets.net/user_files/scca/downloads/000/009/018/rm_15-08.pdf?1438809477
http://mazdaracers.com/topic/5310-cam-sensor-issues-fix/?p=80199
A bad connection at the CPS will cause 99-00 cars to pop and misfire, while 01+ cars will simply shut down.
Chris